JPS62105612A - Manufacture of foamed material product having laminated structure - Google Patents
Manufacture of foamed material product having laminated structureInfo
- Publication number
- JPS62105612A JPS62105612A JP60247350A JP24735085A JPS62105612A JP S62105612 A JPS62105612 A JP S62105612A JP 60247350 A JP60247350 A JP 60247350A JP 24735085 A JP24735085 A JP 24735085A JP S62105612 A JPS62105612 A JP S62105612A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- composite
- foaming
- block
- injected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/0461—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
- B29C44/0476—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other by pouring more than one composition into an open mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/0461—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/0461—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
- B29C44/0469—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other provided with physical separators between the different materials, e.g. separating layers, mould walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/24996—With internal element bridging layers, nonplanar interface between layers, or intermediate layer of commingled adjacent foam layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249981—Plural void-containing components
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Molding Of Porous Articles (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、自動車シート用クッション等に使用される、
異なった物性の発泡層が一体化された積層構造を有する
発泡体製品の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention is applied to cushions for automobile seats, etc.
The present invention relates to a method for manufacturing a foam product having a laminated structure in which foam layers having different physical properties are integrated.
「従来技術とその問題点」
自動車等の乗り心地向上の要求を満たすために、人体と
接する表面側に柔軟な発泡層を形成し、裏面側に硬い発
泡層を形成したシート用クッションが提案されている。"Prior art and its problems" In order to meet the demand for improved ride comfort in automobiles, seat cushions have been proposed that have a flexible foam layer formed on the front surface that contacts the human body and a hard foam layer on the back surface. ing.
この種のクッションが使用されたシートは、表面タッチ
が柔らかく座り込むに従って硬くなるので、快適で安定
した乗り心地を得られる。Seats using this type of cushion have a soft surface to the touch and become harder as you sit on them, providing a comfortable and stable ride.
このようなりッションを製造する方法として、軟質フオ
ームと硬質フオームをそれぞれ別々に成形あるいは裁断
し、それらを接着剤で貼り合わせる方法、あるいは別途
成形された第１層を成形用モールドにセットし、これに
重ねて第２層を成形する方法がある。しかしながら、こ
れらの方法は生産性が低く、クッションの製造コストが
高騰するうえ、接着剤を用いたものにあっては接着部分
が硬くなり着座時に異物感を感じる弊害があった。Methods for manufacturing such cushions include molding or cutting a soft foam and a hard foam separately and pasting them together with adhesive, or setting a separately molded first layer in a mold. There is a method of forming a second layer by overlapping the two layers. However, these methods have low productivity and increase the manufacturing cost of the cushion, and in the case of cushions using adhesives, the bonded portion becomes hard, resulting in a feeling of a foreign body when sitting on the cushion.
このような問題に対処しうる製造方法として、特開昭５
５−９６１９５号公報および特開昭５９−１３８４２３
号公報に記載された方法がある。この製造方法は、第１
３図ないし第１５図に示すように、成形用モールド１に
、まず第一の発泡性液状組成物（以下、第一組成物と略
称する）２を注入し、次いで適当な時期に発泡しつつあ
る第一組成物２の上から第二の発泡性液状組成物（以下
、第二組成物と略称する）３を注入する方法である。こ
の製造方法では、第二組成物３が、発泡過程にあり比重
の低下した第一組成物２を貫いて第一組成物２の下方に
流入し、ここで発泡する。As a manufacturing method that can deal with such problems,
Publication No. 5-96195 and JP-A-59-138423
There is a method described in the publication. This manufacturing method is the first
As shown in Figures 3 to 15, a first foamable liquid composition (hereinafter referred to as the first composition) 2 is first poured into a mold 1, and then foamed at an appropriate time. This is a method in which a second foamable liquid composition (hereinafter abbreviated as the second composition) 3 is injected from above a certain first composition 2. In this manufacturing method, the second composition 3 flows below the first composition 2 through the first composition 2 which is in the foaming process and has a reduced specific gravity, and is foamed here.
ところが、この製造方法にあっては、発泡過程にある第
一組成物２の上から第二組成物３を注入するので、その
注入箇所Ａで第二組成物３が第一組成物２を巻き込み混
合する。このため、得られる製品は、第１６図に示すよ
うに、注入箇所Ａに第一組成物２からなる発泡層２ｂと
第二組成物３からなる発泡層３ｂとの混合層が形成され
る。このため、この方法で製造されたクッションは第二
組成物３の注入箇所Ａの弾性が他の部分と異なり若干の
異物感がある不都合があった。However, in this manufacturing method, since the second composition 3 is injected from above the first composition 2 which is in the foaming process, the second composition 3 engulfs the first composition 2 at the injection point A. Mix. Therefore, in the resulting product, a mixed layer of a foam layer 2b made of the first composition 2 and a foam layer 3b made of the second composition 3 is formed at the injection site A, as shown in FIG. For this reason, the cushion manufactured by this method had the disadvantage that the elasticity of the second composition 3 injection point A was different from that of other parts and gave a slight foreign body feeling.
また、発泡過程にある第一組成物２を貫通して注入され
た第二組成物３が成形用モールド■の底部で広がり難い
ので、第二組成物３から形成される発泡層が注入箇所Ａ
近傍で厚く、そこから離れるにしたがって薄くなる、厚
みの不均一なしのとなり易い。このため、着座感の良好
なりッションを製造できない不満があった。In addition, since the second composition 3 injected through the first composition 2 in the foaming process is difficult to spread at the bottom of the mold (2), the foam layer formed from the second composition 3 is injected at the injection point A.
It tends to be thick in the vicinity and thinner as it moves away from there, with no uneven thickness. For this reason, there was a dissatisfaction that a cushion with a good seating feeling could not be manufactured.
さらに、この製造方法にあっては、下にもぐり込む第二
組成物が第一組成物の発泡圧で圧縮されるため、第二組
成物からなる発泡層が所望する乙のより硬質なものとな
り易い不都合があった。Furthermore, in this manufacturing method, since the second composition that sinks underneath is compressed by the foaming pressure of the first composition, the foam layer made of the second composition tends to be harder than the desired one. There was an inconvenience.
Ｆ問題点を解決するための手段ｊ
そこで本発明の製造方法にあっては、
■成形用モールドのキャビティの底面にリブを立設して
該底面を複数のブロックに仕切り、■仕切られた各ブロ
ックにそれぞれ所定量の発泡性組成物を注入し、
■その際、一方のブロックよりも他方のブロックにより
多量の発泡性組成物を注入して、他方側のブロックに注
入された組成物から発泡する発泡体が一方側のブロック
に注入された組成物から発泡する発泡体に覆い被さるよ
うにすることによって上記問題点の解決を図った。Means for Solving Problem Fj Therefore, in the manufacturing method of the present invention, ■ Ribs are provided on the bottom surface of the cavity of the mold to partition the bottom surface into a plurality of blocks, and ■ Each partitioned block is A predetermined amount of the foaming composition is injected into each block, and ■ At that time, a larger amount of the foaming composition is injected into one block than the other, and the foaming starts from the composition injected into the other block. The above-mentioned problem was solved by allowing the foam to cover the foam formed from the composition injected into one block.
「実施例」
以下、図面を参照して本発明の積層構造を有する発泡体
製品の製造方法を詳しく説明する。"Example" Hereinafter, a method for producing a foam product having a laminated structure according to the present invention will be described in detail with reference to the drawings.
第１図ないし第７図は、本発明の製造方法の第１実施例
を示すもので、図中符号！は成形用モールドである。こ
の成形用モールド１の内部には、直方体状のキャビティ
４が形成されている。このキャビティ４は、第２図ウニ
点鎖線で示すように蓋５で密閉されるようになっている
。1 to 7 show a first embodiment of the manufacturing method of the present invention, and the symbols in the figures! is a mold for forming. A rectangular parallelepiped-shaped cavity 4 is formed inside this mold 1 . This cavity 4 is sealed with a lid 5 as shown by the dashed line in FIG.
この成形用モールドＩのキャビティ４の底面６は平らに
形成されており、コ字状のリブ７によってサイド側の第
一のブロック８と中央部側の第二のブロック９とに仕切
られている。このリブ７は細く形成されたもので、その
高さはキャビティ４の側壁４ａよりも低く形成されてい
る。また、リブ７の高さは、各ブロック８．９に注入さ
れた組成物が最終発泡量の２０％発泡した時の高さに相
当する高さ以上に設定される。このようにリブ７の高さ
を設定すると、このリブ７で仕切られた各ブロック８．
９に注入された組成物ｌ０１１１がリブ７を越えて他方
のブロックに流入することが無く、各組成物ｌ０１１１
はそれぞれある程度ポリマー化、フオーム化してから接
触するので、各組成物の混合が防止される。The bottom surface 6 of the cavity 4 of this mold I is formed flat, and is partitioned by a U-shaped rib 7 into a first block 8 on the side side and a second block 9 on the center side. . This rib 7 is formed thin, and its height is formed lower than the side wall 4a of the cavity 4. Further, the height of the ribs 7 is set to be equal to or higher than the height when the composition injected into each block 8.9 foams by 20% of the final foaming amount. When the height of the rib 7 is set in this way, each block 8.
The composition 10111 injected into the block 9 does not flow into the other block beyond the rib 7, and each composition 10111
Since these are brought into contact after being polymerized and formed to some extent, mixing of the respective compositions is prevented.
次いで、この例の製造方法にあっては第３図に示すよう
に、リブ７で仕切られた成形用モールド亘のサイド側の
第一のブロック８に第一の発泡性組成物（第一組成物）
１０を注入し、中央部側の第二のブロック９に第二の発
泡性組成物（第二組成物）１１を注入する。この例の製
造方法では、第一組成物１０および第二組成物１１とし
て、成分およびその配合比等が、第一組成物ｌＯの発泡
速度が大となるように調整されたものが用いられている
。また、これら第一組成物ｌＯ・第二組成物１１の注入
量も、成形用モールドｌの高さ方向への発泡スピードが
サイド側の第一ブロック８に注入された第一組成物ｌＯ
の方が上回るように、第一組成物１０のほうが多くなる
ように定められている。この例の製造方法において、第
一のブロック８に注入された第一組成物ＩＯの量は、第
一のブロック８内での深さが、第二のブロック９に注入
された第二組成物１１の深さよりも深くなるように定め
られる。Next, in the manufacturing method of this example, as shown in FIG. thing)
10, and a second foamable composition (second composition) 11 is injected into the second block 9 on the center side. In the manufacturing method of this example, as the first composition 10 and the second composition 11, the components and their blending ratios are adjusted so that the foaming rate of the first composition 10 is increased. There is. In addition, the injection amounts of the first composition IO and the second composition 11 are also the same as those of the first composition IO injected into the first block 8 on the side side.
It is determined that the amount of the first composition 10 is greater than that of the first composition 10. In the manufacturing method of this example, the amount of the first composition IO injected into the first block 8 is such that the depth within the first block 8 is the same as the amount of the second composition injected into the second block 9. The depth is determined to be deeper than the depth of 11.
また、各組成物ｌ０１Ｉｆの注入時期は、何れかを早期
に注入してもよいが、この例では第一組成物１０、第二
組成物１１がほぼ同時に注入される。In addition, as for the timing of injection of each composition 101If, either one may be injected earlier, but in this example, the first composition 10 and the second composition 11 are injected almost simultaneously.
注入された組成物ｌ０１１１は、その後それぞれ発泡を
開始する。各組成物ｌ０１１１の発泡量が最終発泡量の
２０％以上になった時、各組成物ｌ０１１１はリブ７を
越えて互いに接するようになる。そして、この例にあっ
ては第４図に示すように発泡速度の速い第一組成物１０
が先に上昇し、ついには第５図に示すように、第二組成
物Ｉｆの上面に覆い被さるようにして膨張する。そして
最終的には、第６図に示すように、第一組成物ＩＯが第
二組成物１１を覆う状態で、キャビティ４が満たされる
。このようにして各組成物ｌ０１１１の発泡反応が完了
した後、成形品は発泡体製品としてモールドｌから取り
出される。The injected compositions 10111 then each begin to foam. When the foaming amount of each composition 10111 reaches 20% or more of the final foaming amount, each composition 10111 comes to touch each other beyond the rib 7. In this example, as shown in FIG. 4, the first composition 10 having a high foaming speed is
first rises, and finally expands to cover the upper surface of the second composition If, as shown in FIG. Finally, as shown in FIG. 6, the cavity 4 is filled with the first composition IO covering the second composition 11. After the foaming reaction of each composition 10111 has been completed in this way, the molded article is removed from the mold 1 as a foam product.
得られた発泡体製品は、第７図に示すように、第一組成
物１０からなる第一発泡層１０ａと第二発泡層１１ａが
積層された乙のとなる。そして、第二組成物１１に軟質
な発泡体となるものを用いれば、得られる発泡体製品は
着座した際、その初期は柔らかく、座り込むに従って硬
質となり人体を確実に保持する理想的なりッションとな
る。As shown in FIG. 7, the obtained foam product has a first foam layer 10a made of the first composition 10 and a second foam layer 11a laminated together. If a soft foam product is used as the second composition 11, the resulting foam product will be soft at the beginning when sitting on it, and will become harder as the person sits on it, making it an ideal cushion that securely holds the human body. .
「作用 」
この製造方法にあっては、リブ７で仕切られた各ブロッ
ク８．９にそれぞれ組成物ｌ０１１１を所定量注入する
ので、各組成物ｌ０１１１は初期に於いて自由に発泡で
きる。従って、第一組成物１０の下になる第二組成物１
１からなる第二発泡層１１ａも所望する硬度のものとす
ることが容易にでき、品質の安定した発泡体製品を得る
ことができる。 また、リブ７で仕切られた各ブロック
８．９に注入された第二組成物ＩＩと第一組成物ＩＯは
、それぞれある程度ポリマー化、フオーム化した状態と
なってから接触するので、各組成物１０．１１の混合が
防止される。従って、第一組成物１０からなる第一発泡
層１０ａと第二組成物■１からなる第二発泡層１１ａと
は滑らかで柔軟性のある境界面Ｂを境に接合一体化した
ものとなる。"Operation" In this manufacturing method, a predetermined amount of composition 10111 is injected into each block 8.9 partitioned by rib 7, so each composition 10111 can be foamed freely in the initial stage. Therefore, the second composition 1 below the first composition 10
The second foam layer 11a made of 1 can also be easily made to have a desired hardness, and a foam product with stable quality can be obtained. Furthermore, since the second composition II and the first composition IO injected into each block 8.9 partitioned by the rib 7 come into contact after being polymerized and formed to some extent, each composition 10.11 mixing is prevented. Therefore, the first foamed layer 10a made of the first composition 10 and the second foamed layer 11a made of the second composition 1 are joined and integrated across the smooth and flexible interface B.
また、この例の製造方法では、第一組成物ＩＯと第二組
成物ＩＩを同時にキャビティ４に注入するので、短い成
形サイクルで効率良く発泡体製品を生産できる。Moreover, in the manufacturing method of this example, since the first composition IO and the second composition II are simultaneously injected into the cavity 4, a foam product can be efficiently produced with a short molding cycle.
「他の実施例」
第８図ないし第１２図は本発明の製造方法の第２実施例
を説明するためのもので、上記実施例と同一構成部分に
は、同一符号を付して説明を簡略化する。"Other Embodiments" FIGS. 8 to 12 are for explaining the second embodiment of the manufacturing method of the present invention, and the same components as in the above embodiments are given the same reference numerals and explained. Simplify.
この例の製造方法にあっては、成形用モールドｌとして
、キャビティ４の底面６がリブ７の外側で、外方に向か
って漸次下降するしのが用いられる。In the manufacturing method of this example, a mold 1 is used in which the bottom surface 6 of the cavity 4 is outside the rib 7 and gradually descends toward the outside.
この例の製造方法にあっても、第１Ｏ図に示すように、
リブ７で仕切られた第一のブロック８に第一組成物ｌＯ
が注入され、第二のブロック９に第二組成物１１が注入
される。Even in the manufacturing method of this example, as shown in Figure 1O,
A first composition lO is placed in a first block 8 partitioned by ribs 7.
is injected, and the second composition 11 is injected into the second block 9.
注入された組成物１０、ｔｉはそれぞれ発泡を開始して
、発泡速度の速い第一組成物１０が先に上昇し、第二組
成物１１の上面に覆い被さるようにして膨張し、最終的
に第１！図に示すように、第一組成物ｌＯが第二組成物
１１を覆う状態で、キャビティ４が満たされる。このよ
うにして各組成物ｌ０１１１の発泡反応が終了した後、
成形品はモールド１から取り出される。The injected compositions 10 and ti each start foaming, and the first composition 10, which has a faster foaming speed, rises first, expands to cover the upper surface of the second composition 11, and finally 1st! As shown, the cavity 4 is filled with the first composition lO covering the second composition 11. After the foaming reaction of each composition 10111 is completed in this way,
The molded product is taken out from the mold 1.
この製造方法によれば、第１２図に示すように、両側部
に略三角形状の第一組成物１０からなるホールド部！２
．１２が形成された発泡体製品が得られる。According to this manufacturing method, as shown in FIG. 12, a hold portion consisting of the substantially triangular first composition 10 on both sides! 2
．． A foam product having 12 formed thereon is obtained.
「実験例１ 」
第１図および第２図に示したモールドｌを作成した。キ
ャビティ４は、深さｘ幅Ｘ長さ＝７０ｘｘＸ４００ｘｉ
Ｘ４００１ｊｌであった。このモールドｌの底面６に高
さ３０ｊＩＪＩのコ字状のリブ７を立設した。このリブ
７で形成された第二のブロック９は深さＸ幅×長さ＝３
０肩ｉＸ ２５０ｙｘＸ ２５０ｍｍであった。"Experimental Example 1" A mold 1 shown in FIGS. 1 and 2 was created. Cavity 4 has depth x width x length = 70xx x 400xi
It was X4001jl. A U-shaped rib 7 with a height of 30jIJI was provided on the bottom surface 6 of this mold l. The second block 9 formed by this rib 7 has depth x width x length = 3
0 shoulder iX 250yxX 250mm.
このモールド１を水平に設置し、第二のブロック９に第
二組成物！ｌを３００９注入し、その後直ちに第一のブ
ロック９に第一組成物１０を５００９注入した。第一組
成物１０及び第二組成物１１の組成は下表の通りである
。This mold 1 is installed horizontally, and the second composition is placed on the second block 9! Immediately thereafter, 5009 doses of the first composition 10 were injected into the first block 9. The compositions of the first composition 10 and the second composition 11 are shown in the table below.
表 （単位二重置部）
注入された第一組成物ｌＯ１第二組成物１１は、いずれ
も約１０秒でクリーム状になり発泡を開始したが、第二
組成物１１の発泡速度は、第一組成物ＩＯの発泡速度に
比較して遅かった。そして、発泡開始後約５秒で第一組
成物１０が高さ３０′ＩＩ！ｌのリブ７の上端を越え、
第二組成物！■は６秒後にリブ７上端を越えた。Table (Unit double placement part) The injected first composition lO1 and second composition 11 all became creamy and started foaming in about 10 seconds, but the foaming speed of the second composition 11 was The foaming rate was slow compared to that of one composition IO. Then, about 5 seconds after the start of foaming, the first composition 10 reaches a height of 30'II! Beyond the upper end of the rib 7 of l,
Second composition! ■ exceeded the upper end of rib 7 after 6 seconds.
そして、第一組成物１０と第二組成物１１は接したが、
その後第一組成物１０の発泡速度は更に増し、第二組成
物１１の発泡速度は漸次低下した。Then, the first composition 10 and the second composition 11 came into contact with each other, but
Thereafter, the foaming speed of the first composition 10 further increased, and the foaming speed of the second composition 11 gradually decreased.
この時点でモールド１の蓋５を閉じて、モールドＩを密
閉した。その状態で１分間室温に放置したのち、８０℃
のオーブン内に１０分間収容してキュアした。この後、
蓋５を開き成形品を取り出した。At this point, the lid 5 of the mold 1 was closed to seal the mold I. After leaving it at room temperature for 1 minute in that state, 80℃
It was placed in an oven for 10 minutes to cure. After this,
The lid 5 was opened and the molded product was taken out.
得られた発泡体製品を裁断して調べたところ、第７図に
示すように、第二組成物１１からなる軟質の第二発泡層
１１ａが第一組成物！０からなる硬質な第一発泡層１０
ａで囲まれたものであった。When the obtained foam product was cut and examined, as shown in FIG. 7, the soft second foam layer 11a made of the second composition 11 was the first composition! A hard first foam layer 10 consisting of 0
It was surrounded by a.
また、第一組成物２の発泡層２ｂと第二組成物３の発泡
層３ｂの境界面Ｂは滑らかに形成されていた。Moreover, the boundary surface B between the foam layer 2b of the first composition 2 and the foam layer 3b of the second composition 3 was formed smoothly.
次ぎに、上記のように製造された発泡体製品（発泡体Ｃ
）の圧縮特性を調べた。比較のために、同様のモールド
ｌに第二組成物１１を８００９注入して製造した発泡体
Ａと、第一組成物！０を７００ｇ注入して製造した発泡
体Ｂについても圧縮特性を調べた。Next, the foam product produced as described above (foam C
) was investigated. For comparison, Foam A was produced by injecting 8009 of the second composition 11 into a similar mold l, and the first composition! The compression properties of foam B manufactured by injecting 700 g of 0 were also investigated.
圧縮特性は、各発泡体を直径２００■の円板で１００
ａｕ１分の速度で押圧した時の発泡体の初期圧縮硬度（
２５％圧縮硬度）と最終圧縮硬度（６５％圧縮硬度）か
ら算出される、サグファクター（ｓａｇ ｆａｃｔｏｒ
）により調べた。尚、サグファクターとは６５％圧縮硬
度７２５％圧縮硬度の比である。この比が大きい発泡体
はど、着席した際の表面タッチが柔らかく座り込んでい
くに従って硬くなり、最終的に底付き感がなく、しかも
体をしっかりと支持する座り心地の良いクッションとな
ると評価できる。 圧縮特性を調べた結果、本発明の製
造方法で製造された発泡体製品のサグファクターは３゜
８、発泡体Ａは３．２、発泡体Ｂは３，０であり、本発
明の方法によればサグファクターが大きく座り心地のよ
いクッションを製造できることが判明した。The compression properties are as follows:
Initial compression hardness of the foam when pressed at a speed of au1 minute (
The sag factor is calculated from the final compression hardness (25% compression hardness) and the final compression hardness (65% compression hardness).
). Note that the sag factor is the ratio of 65% compression hardness to 725% compression hardness. A foam with a high ratio will have a soft surface when you sit on it, and it will become harder as you sit down, eventually creating a cushion that is comfortable to sit on and doesn't feel like it's bottoming out, yet firmly supports your body. As a result of examining the compression properties, the sag factor of the foam products manufactured by the manufacturing method of the present invention was 3.8, 3.2 for foam A, and 3.0 for foam B. According to the research, it was found that a cushion with a large sag factor and high comfort can be manufactured.
「実験例２ 」
第８図および第９図に示したモールドｌを用いて、自動
車用クッションを製造した。"Experimental Example 2" An automobile cushion was manufactured using the mold 1 shown in FIGS. 8 and 9.
モールド！のキャビティ４は、深さＸ幅×長さ＝４５０
ｘ肩ｘ４５０＋ｘｘ１００次肩、リブ７の高さが３０ｍ
ｍのものであった。また、このリブ７で形成された第二
のブロック９は深さＸ幅×長さ＝３０ｊ！麓ｘ３００ｚ
ｘｘ３５０肩次であった。mold! Cavity 4 is depth x width x length = 450
x Shoulder x 450 + xx 100th shoulder, height of rib 7 is 30 m
It was from m. Also, the second block 9 formed by this rib 7 has depth x width x length = 30j! foot x300z
It was 350 years old.
第二のブロック９に第二組成物１１を２００９注入し、
その後直ちに第一のブロック８に第一組成物！０を９０
０９注入した。Injecting the second composition 11 into the second block 9 in 2009,
Then immediately add the first composition to the first block 8! 0 to 90
09 was injected.
以後実験例１と同様の手順で、第１２図に示す発泡体製
品が得られた。この発泡体製品のサグファクターを測定
したところ、４．０と良好な値であった。Thereafter, the same procedure as in Experimental Example 1 was followed to obtain the foam product shown in FIG. 12. When the sag factor of this foam product was measured, it was found to be a good value of 4.0.
なお、以上の説明では、キャビティ４の底面６が二つの
ブロック８．９に仕切られた成形用モールド！を示した
が、モールド！の底面６はより多くのブロックに仕切る
こともできる。In addition, in the above explanation, the bottom surface 6 of the cavity 4 is partitioned into two blocks 8.9. But the mold! The bottom surface 6 of can also be partitioned into more blocks.
また、各組成物を各ブロックに注入するタイミングは、
同時あるいはほぼ同時である必要はなく、第一の組成物
の発泡・上昇が停止した後に第二の組成物を注入するな
どしてもよい。この場合、成形サイクルが延びるので生
産性が低下するが、第一の組成物からなる発泡層と第二
の組成物からなる発泡層との境界面Ｂにおけるボイド発
生をほぼ完全に防止できる利点がある。また、先に注入
された第一の組成物は自由に発泡するので、その分密塵
が低下し柔軟に形成される。このため、第一の組成物と
第二の組成物の同一のものを用いても、第一の発泡層と
第二の発泡層の硬度を変化せしめることができる。Also, the timing of injecting each composition into each block is as follows:
It is not necessary to inject the second composition simultaneously or almost simultaneously, and the second composition may be injected after the first composition stops foaming and rising. In this case, productivity decreases because the molding cycle is extended, but the advantage is that the generation of voids at the interface B between the foam layer made of the first composition and the foam layer made of the second composition can be almost completely prevented. be. Moreover, since the first composition injected first foams freely, the density of dust is reduced accordingly and the composition is formed flexibly. Therefore, even if the same first composition and second composition are used, the hardness of the first foam layer and the second foam layer can be changed.
「発明の効果」
以上説明したように、本発明の積層構造を有する発泡体
製品の製造方法は、成形用モールドのキャビティの底面
をリブで仕切り、仕切られた各ブロックに発泡性組成物
を注入する方法なので、各組成物は初期に於いて互いに
その発泡を制限することがなく、相互に自由に発泡でき
る。従って、第一組成物の下となる第二組成物からなる
第二発泡層も所望する硬度のむのとすることが容易にで
き、品質の安定した成形品を得ることができる。"Effects of the Invention" As explained above, the method of manufacturing a foam product having a laminated structure according to the present invention involves partitioning the bottom surface of the cavity of a mold with ribs, and injecting a foamable composition into each partitioned block. This method allows each composition to foam freely without restricting its foaming to each other in the initial stage. Therefore, the second foamed layer made of the second composition underlying the first composition can also be easily made to have a desired hardness, and a molded article with stable quality can be obtained.
また、本発明の製造方法にあっては、リブで仕切られた
各ブロックに注入された各組成物は、それぞれある程度
ポリマー化、フオーム化した状態となってから接触する
ので、各組成物の混合が防止される。従って、本発明の
方法によれば、各組成物からなる各発泡層が滑らかで柔
軟性のある境界面を境に接合一体化した、着座感の良好
な発泡体製品を製造することができる。In addition, in the manufacturing method of the present invention, each composition injected into each block partitioned by ribs comes into contact with each other after being polymerized and formed to some extent, so that each composition is mixed. is prevented. Therefore, according to the method of the present invention, it is possible to produce a foam product with a good sitting feeling, in which each foam layer made of each composition is bonded and integrated with a smooth and flexible interface.
第１図ないし第６図は本発明の積層構造を有する発泡体
製品の製造方法の第一実施例を説明するためのもので、
第１図は同実施例に用いた成形用モールドを示す平面図
、第２図は第１図のｌｌ−ｆｆ線線断断面図第３図は成
形用モールドの各組成物−を注入した状態を示す断面図
、第４図および第５図は各組成物の発泡過程を示す断面
図、第６図は各組成物の発泡が終了した状態を示す断面
図、第７図は第１実施例の製造方法で得られた成形品を
示す断面図、第８図ないし第１２図は本発明の製造方法
の第二実施例を説明するためのもので、第８図は同実施
例に用いた成形用モールドを示す平面図、第９図は第８
図のＩＸ −ＩＸＸ線断断面図第１θ図は成形用モール
ドの各組成物を注入した状態を示す断面図、第１１図は
各組成物の発泡が終了した状態を示す断面図、第１２図
は第２実施例の製造方法で得られた成形品を示す断面図
、第１３図ないし第１５図は従来の発泡体製品の製造方
法を示す断面図、第１６図は同従来の製造方法で得られ
た発泡体製品を示す断面図である。
！・・・成形用モールド（モールド）、４・・・キャビ
ティ６・・・底面、７・・・リブ、８・・・第一のブロ
ック、９・・・第二のブロック、
１０・・・第一の発泡性液状組成物（第一組成物）、１
１・・・第二の発泡性液状組成物（第二組成物）第２図
第８図
第４図
第５図
第６図
日
第７図
第１０図
第１１図
第１２図Figures 1 to 6 are for explaining a first embodiment of the method for manufacturing a foam product having a laminated structure according to the present invention.
Fig. 1 is a plan view showing the mold used in the same example, Fig. 2 is a sectional view taken along the line ll-ff in Fig. 1, and Fig. 3 is a state of the mold in which each composition is injected. FIG. 4 and FIG. 5 are cross-sectional views showing the foaming process of each composition. FIG. 6 is a cross-sectional view showing the state in which foaming of each composition is completed. FIG. 7 is a cross-sectional view showing the foaming process of each composition. FIG. 7 is a cross-sectional view showing the foaming process of each composition. 8 to 12 are cross-sectional views showing molded products obtained by the manufacturing method of the present invention, and are for explaining the second embodiment of the manufacturing method of the present invention. A plan view showing the mold for forming, FIG.
A cross-sectional view taken along the line IX-IXX in the figure. Figure 1θ is a cross-sectional view showing the state in which each composition is injected into the mold. Figure 11 is a cross-sectional view showing the state in which each composition has been foamed. Figure 12 13 to 15 are cross-sectional views showing a conventional foam product manufacturing method, and FIG. 16 is a cross-sectional view showing a molded product obtained by the manufacturing method of the second embodiment. FIG. 3 is a cross-sectional view showing the obtained foam product. ! ... Molding mold (mold), 4... Cavity 6... Bottom surface, 7... Rib, 8... First block, 9... Second block, 10... Third 1 foamable liquid composition (first composition), 1
1...Second foamable liquid composition (second composition) Figure 2 Figure 8 Figure 4 Figure 5 Figure 6 Date Figure 7 Figure 10 Figure 11 Figure 12
Claims (1)
底面を複数のブロックに仕切り、これら仕切られた各ブ
ロックにそれぞれ発泡性組成物を注入し、その際一方の
ブロックよりも他方のブロックにより多量の発泡性組成
物を注入して、他方側のブロックに注入された組成物か
ら発泡する発泡体が一方側のブロックに注入された組成
物から発泡する発泡体に覆い被さるようにしたことを特
徴とする積層構造を有する発泡体製品の製造方法。Ribs are provided on the bottom of the cavity of the mold to partition the bottom into a plurality of blocks, and the foaming composition is injected into each of the partitioned blocks, with the foaming composition being injected into one block more than the other. A large amount of the foamable composition was injected so that the foam formed from the composition injected into the other block covered the foam formed from the composition injected into the one block. A method for producing a foam product having a characteristic laminated structure.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60247350A JPS62105612A (en) | 1985-11-05 | 1985-11-05 | Manufacture of foamed material product having laminated structure |
| DE19863637680 DE3637680A1 (en) | 1985-11-05 | 1986-11-05 | METHOD FOR PRODUCING FOAMED OBJECTS WITH LAMINATE STRUCTURE |
| US06/927,113 US4762654A (en) | 1985-11-05 | 1986-11-05 | Method for making foamed articles having a laminated structure |
| GB8626392A GB2182604B (en) | 1985-11-05 | 1986-11-05 | Method for making foamed articles having a laminated structure |
| GB8906092A GB2213094B (en) | 1985-11-05 | 1989-03-16 | Method for making foamed articles having a laminated structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60247350A JPS62105612A (en) | 1985-11-05 | 1985-11-05 | Manufacture of foamed material product having laminated structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62105612A true JPS62105612A (en) | 1987-05-16 |
Family
ID=17162102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60247350A Pending JPS62105612A (en) | 1985-11-05 | 1985-11-05 | Manufacture of foamed material product having laminated structure |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4762654A (en) |
| JP (1) | JPS62105612A (en) |
| DE (1) | DE3637680A1 (en) |
| GB (1) | GB2182604B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6313718A (en) * | 1986-07-04 | 1988-01-21 | Nanba Press Kogyo Kk | Manufacture of foamed material of multi-layer and different-hardness |
| JPH07106167B2 (en) * | 1986-12-01 | 1995-11-15 | 株式会社ブリヂストン | Cushion |
| DE3705409A1 (en) * | 1987-02-20 | 1988-09-01 | Bayer Ag | METHOD FOR PRODUCING UPHOLSTERY, IN PARTICULAR SEAT UPHOLSTERY FOR MOTOR VEHICLES |
| US4755411A (en) * | 1987-04-22 | 1988-07-05 | Milsco Limited | Cushion having flexible outer membrane and multi-density resilient foam member therein |
| US4927694A (en) * | 1988-08-17 | 1990-05-22 | Ikeda Bussan Co., Ltd. | Method of producing skin-covered pad for seat |
| GB8906297D0 (en) * | 1989-03-18 | 1989-05-04 | Bp Chem Int Ltd | Process for preparing multihardness foam articles |
| GB8911457D0 (en) * | 1989-05-18 | 1989-07-05 | Bp Chem Int Ltd | Process for preparing multihardness foam articles |
| US5590454A (en) * | 1994-12-21 | 1997-01-07 | Richardson; Kendrick E. | Method and apparatus for producing parts by layered subtractive machine tool techniques |
| US5569420A (en) * | 1995-02-06 | 1996-10-29 | Van Horne; Bret L. | Method of forming a foam core comprising a plurality of arcuate rows |
| IT1286974B1 (en) * | 1996-04-19 | 1998-07-24 | Finproject Spa | METHOD FOR INJECTION PRINTING SOLES MADE WITH EXPANDABLE AND CROSS-LINKABLE "EVA" BASED COMPOUNDS AND LAYING ON THE PLANT OF |
| EP1110694B1 (en) * | 1999-12-23 | 2003-03-12 | Giacoma Olivier | Method for producing partially expanded bodies with a PVC-based cellular structure and mould for their production |
| DE60120057T2 (en) | 2000-08-11 | 2007-01-04 | Tokai Kogyo K.K., Obu | Method for producing molded cushions |
| WO2004058473A1 (en) * | 2002-12-24 | 2004-07-15 | Bridgestone Corporation | Polyurethane foam molding, method of producing the same, and seat pad for motor vehicle |
| WO2008021200A1 (en) * | 2006-08-09 | 2008-02-21 | Dow Global Technologies, Inc. | Multi-segment expandable polymer compositions which expand in a controllable direction |
| JP6007722B2 (en) | 2012-10-19 | 2016-10-12 | スズキ株式会社 | Vehicle seat back structure |
| AT519381A2 (en) * | 2016-11-24 | 2018-06-15 | Fill Gmbh | Process for producing a shaped body |
| WO2018211743A1 (en) * | 2017-05-16 | 2018-11-22 | 株式会社ブリヂストン | Foam molding mold and method for manufacturing foam molding body |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU33533A1 (en) * | 1954-10-26 | |||
| US3020587A (en) * | 1958-04-03 | 1962-02-13 | Sterling Alderfer Company | Process and apparatus for the manufacture of sealing strips or gaskets |
| US3101244A (en) * | 1960-10-21 | 1963-08-20 | Davidson Rubber Company Inc | Method for molding articles |
| US3127457A (en) * | 1960-11-18 | 1964-03-31 | Du Pont | Method of molding a polyurethane foam in a mold having an improved release agent |
| GB1003033A (en) * | 1961-04-29 | 1965-09-02 | Dunlop Rubber Co | Improvements in and relating to moulds |
| US3320339A (en) * | 1963-10-23 | 1967-05-16 | Dayco Corp | Method of manufacturing foam rubber articles |
| US3393258A (en) * | 1963-10-23 | 1968-07-16 | Dayco Corp | Method of molding unitary foam rubber articles |
| US3423490A (en) * | 1964-03-02 | 1969-01-21 | Dayco Corp | Method of manufacturing unitary foam rubber articles |
| US3257149A (en) * | 1964-12-28 | 1966-06-21 | Gen Motors Corp | Seat pad formation |
| US4190697A (en) * | 1979-01-15 | 1980-02-26 | Milsco Manufacturing Company | Multidensity foam article and method of preparation |
| US4405681A (en) * | 1983-01-20 | 1983-09-20 | Milsco Manufacturing Company | Foam article and method of preparation |
| US4541885A (en) * | 1983-06-10 | 1985-09-17 | General Motors Corporation | Method of manufacturing a vehicle seat cover |
| DE3327724A1 (en) * | 1983-08-01 | 1985-02-14 | Dunlop Ag, 6450 Hanau | METHOD AND DEVICE FOR PRODUCING UPHOLSTERY BODIES FROM MOLDED FOAM |
| FR2562882B1 (en) * | 1984-04-16 | 1989-11-17 | Nhk Spring Co Ltd | SEAT PADDING AND MANUFACTURING METHOD THEREOF |
| CA1309220C (en) * | 1985-12-25 | 1992-10-27 | Tetsuo Kita | Process for producing laminated resin foam and mold therefor |
-
1985
- 1985-11-05 JP JP60247350A patent/JPS62105612A/en active Pending
-
1986
- 1986-11-05 DE DE19863637680 patent/DE3637680A1/en not_active Withdrawn
- 1986-11-05 GB GB8626392A patent/GB2182604B/en not_active Expired - Fee Related
- 1986-11-05 US US06/927,113 patent/US4762654A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US4762654A (en) | 1988-08-09 |
| DE3637680A1 (en) | 1987-05-07 |
| GB2182604B (en) | 1990-04-04 |
| GB8626392D0 (en) | 1986-12-03 |
| GB2182604A (en) | 1987-05-20 |
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